Abstract: A method and apparatus are disclosed for establishing connections in a distributed computing system to execute a job having a group of processes. Connection acceptors associated individually with each process wait for on demand connection requests. A determination is made whether a connection is already established between a sender process and a receiver process. If none exists, the connection acceptor receives the new connection on demand request associated with the receiver process. The requested new connection is established to facilitate the processes. Other connections between other processes may also be established for completing the job.

Abstract: A system and method are disclosed for high performance message passing between an origin computing node and a target computing node. A target progress thread is caused to receive a message from an origin process user thread to initiate a one sided communication operation. A target copy buffer of a target process thread is caused to respond to the received message for assisting in completing communication operations.